The sorting out of, interpretation, analysis and integration of stimuli by the sense organs and brain

Define absolute threshold

The smallest intensity of a stimulus that must be present for the stimulus to be detected

Define Just Noticeable Difference

Just Noticeable Difference the smallest level of added or reduced stimulation required to sense that a change in stimulation has occurred

You are sitting directly in front of the marching band
at a pep rally. When they first begin to
play, it is so loud that you think it is unbearable. After 30 minutes, you hardly notice the brass
section screeching behind you. This is
an example of sensory

adaptation

location and function of the iris

part of eye located near the optic nerve, It separates the anterior and posterior chambers of the eyeball

location and function of the pupil

located in the center of the iris, It regulates the amount of light that enters the eye

location and function of the fovea

located in the back of the eye, flips image right side up

location and function of rods

located in the back of the eyeball, highly sensitive to light

location and function of cones

located in back of eyeball, sharp focus and color perception

What are ganglion cells? Where are they located? What is their function?

Located in the retina,works like cons and rods

Describe the trichromatic theory of vision.

The theory that there are three kinds of cones in the retina, each of which responds primarily to a specific range of wavelengths

Describe the opponent process theory.

The theory that receptor cells for color are linked in pairs, working in opposition to each other

What is the structure and function of the cochlea?

A coiled tube in the ear filled with fluid that vibrates in response to sound

Describe the gate-control theory of pain

The theory that particular nerve receptors in the spinal cord lead to specific areas of the brain related to pain

What happens to our skeletal muscles during REM sleep?

Our muscles relax so we don't act out our dreams

About what percentage of total sleep time do adults spend in REM sleep?